CN204462368U - A kind of portable type current transformer graph of errors proving installation - Google Patents
A kind of portable type current transformer graph of errors proving installation Download PDFInfo
- Publication number
- CN204462368U CN204462368U CN201520183723.XU CN201520183723U CN204462368U CN 204462368 U CN204462368 U CN 204462368U CN 201520183723 U CN201520183723 U CN 201520183723U CN 204462368 U CN204462368 U CN 204462368U
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- pci
- current transformer
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- power supply
- gear
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Abstract
A kind of portable type current transformer graph of errors proving installation, comprise pci signal capture card, power supply exports control card, controllable electric power, PC, the signal input part of pci signal capture card is connected with current transformer TA secondary side, pci signal capture card connects PC by pci interface, and power supply output control card carries out communication with PC and is connected.Current transformer TA secondary side connects controllable electric power by gear loop.Power supply exports control card and sends to pci signal capture card the pulse signal that trigger data reads in, and pci signal capture card connects controllable electric power by multiple IGBT, and pci signal capture card is used for selecting the gear of controllable electric power.The utility model is a kind of portable type current transformer graph of errors proving installation, directly obtains current signal with high-acruracy survey card, is calculated and obtains excitation volt-ampere family curve, greatly shorten working hours, reduce workload, improve measuring accuracy by PC.
Description
Technical field
A kind of portable type current transformer graph of errors of the utility model proving installation, the graph of errors test job efficiency of current transformer and measuring accuracy during for improving operating maintenance.
Background technology
Along with the continuous reinforcement that China Power Grids is built, the continuous increase of power transmission and transformation capacity, electric system is just towards the direction fast development of UHV (ultra-high voltage), big current, thus this also proposes requirements at the higher level to the safe and stable operation of electric system.Current transformer, as the important devices of electric system, is widely used in relay protection field.When electric system is broken down, the fault current flowing through protection element is conveyed to protective relaying device, for the correct operation of device provides foundation by current transformer.Therefore current transformer Output rusults is whether accurate, can direct relation the secondary device such as measure and control device and protective relaying device and normally be run.And just seem particularly important as the current transformer error family curve detecting current transformer Output rusults accuracy.
At present, most electric power debugging unit and testing department carry out manual work to the error characteristics analysis of current transformer only by equipment and obtain check results, recycle checking data afterwards to calculate, the method workload is large, in addition lack scientific and effective analysis tool, cause great difficulty to error characteristics analysis.Meanwhile some units consider to utilize microcomputer to carry out testing and the error characteristics curve drawing current transformer, to increase work efficiency and to draw accuracy.Separately have some Chinese scholars to propose to utilize software engineering, adopt the method for matching to draw the error characteristics curve of current transformer, the method is easy to operation, and workload is moderate, can reach quite high fitting precision.But have not yet to see the applied research of portable type current transformer drawing tool in engineering of Based PC technology.
Summary of the invention
In analyzing the error characteristics of current transformer for prior art, manual test inefficiency error is large, to such an extent as to can not realize the problem to the drafting of graph of errors high-efficiency high-precision.The utility model provides a kind of portable type current transformer graph of errors proving installation, directly obtains current signal with high-acruracy survey card, is calculated and obtains excitation volt-ampere family curve, greatly shorten working hours, reduce workload, improve measuring accuracy by PC.
The technical scheme that the utility model adopts is:
A kind of portable type current transformer graph of errors proving installation, comprise pci signal capture card, power supply exports control card, controllable electric power, PC, the signal input part of pci signal capture card is connected with current transformer TA secondary side, pci signal capture card connects PC by pci interface, and power supply output control card carries out communication with PC and is connected.Current transformer TA secondary side connects controllable electric power by gear loop.Power supply exports control card and sends to pci signal capture card the pulse signal that trigger data reads in, and pci signal capture card connects controllable electric power by multiple IGBT, and pci signal capture card is used for selecting the gear of controllable electric power.
Described power supply exports control card and comprises power module, data processing module, serial communication module, level switch module, I/O interface, pci interface; Described power module, powers for giving ARM single-chip microcomputer; Described data processing module, for the low and high level of control I/O interface; Described serial communication module, for pci interface communication, insert PC by pci interface; Described I/O interface, level switch module, for selecting power supply gear and exporting trigger pulse and gating pulse; By I/O interface, select the gear that will carry out the power supply measured, and multi-way control signals pulse is provided.
The different gear of described controllable electric power forms different gear loop from current transformer TA secondary side, an IGBT is accessed in each gear loop, the I/O interface that power supply exports control card is connected with IGBT, by the level of control I/O interface, select the gear of controllable electric power, simultaneously when the grid of the IGBT of this gear receive power supply export the trigger pulse that control card sends time, this gear loop is in running order, pci signal capture card carries out data acquisition, pci signal capture card gathers secondary side current signal, finally result is sent to PC.
A kind of portable type current transformer graph of errors of the utility model proving installation, technique effect is as follows:
1), adopt PCI high-precision signal capture card to achieve high precision, jamproof quick sampling, make collection comparatively accurate, draw for graph of errors and authentic data is provided.
2), adopt controllable electric power, exported the connected applications of control card by wholly-controled device IGBT and power supply, realize selecting AC power gear, reduce workload.
3), PC completes whole test experiments automatically, and be easy to operation, workload is little, solves the efficiency of manual verification and the low problem of accuracy.
Accompanying drawing explanation
Fig. 1 is the connection diagram of the utility model device.
Fig. 2 is that the power supply of the utility model device exports control card inner structure schematic diagram.
Embodiment
As Fig. 1, shown in Fig. 2, a kind of portable type current transformer graph of errors proving installation, comprise pci signal capture card 1, power supply exports control card 2, controllable electric power 3, PC 4, the signal input part of described pci signal capture card 1 is connected with current transformer TA secondary side, pci signal capture card connects PC by pci interface, power supply exports control card and carries out communication by pci interface and PC, power supply exports control card and sends to pci signal capture card the pulse signal that trigger data reads in, selected by the gear of I/O interface to controllable electric power of power supply output control card simultaneously, when the IGBT grid of this gear path receives trigger pulse and then conducting that control card sends.The current value that PC gathers out according to pci signal capture card, draws current transformer error curve.
Controllable electric power 3 is autotransformers, the different gears of different tap corresponding power, each gear and current transformer TA secondary side form different circuit, an IGBT is accessed in each gear loop, the I/O interface that power supply exports control card 2 is connected with the IGBT of controllable electric power, the level of control I/O interface, selects the gear of power supply.Simultaneously when the grid of the IGBT of this gear receive power supply export the trigger pulse that control card 2 sends time, this gear loop is in conducting state, can carry out data acquisition further by pci signal capture card 1.
As shown in Figure 2, this power supply output control card 2 comprises power module, data processing module, serial communication module, level switch module, I/O interface and pci interface.Power module, powers for giving ARM single-chip microcomputer.Data processing module, for the low and high level of control I/O interface.Serial communication module, for pci interface communication, insert PC I/O interface and level switch module by pci interface, for selecting power supply gear and exporting trigger pulse and gating pulse.Select to carry out the gear of the power supply measured by I/O mouth, and provide multi-way control signals pulse, the IGBT now on the gear path chosen of controllable electric power 3 receives gate trigger current, thus makes the power supply gear chosen carry out work.One road start pulse signal is provided simultaneously, triggers pci signal capture card 1 and read in data function.
Pci signal capture card 1 selects model PCI-6014, for gathering secondary side current signal, this data acquisition card has the input impedance of 100G Ω, ensure that undesired signal can not affect the signal of inflow, thus greatly improve data accuracy, in addition, available other of this card meet the capture card replacement of measuring and requiring, have replicability.
Power supply exports the pci card with output pulse and gating pulse that control card 2 is ARM Single Chip Microcomputer (SCM) system oneself exploitations, and be inserted in during operation on the PCI slot of industrial computer, provide a road start pulse signal, trigger pip capture card reads in data function; The pulse of many groups control signal, controls the gear of secondary side power supply.
During utility model works, the low and high level being exported the I/O interface of control card 2 by power supply selects power supply gear, the trigger pulse that the IGBT grid of this gear sends by receiving control card, this AC power is made to access mutual inductor secondary side, power supply exports control card 2 and also provides a road trigger pulse simultaneously, trigger pci signal capture card 1 and read in Current Transformer Secondary side current signal, the data gathered afterwards are received by PC 4, PC 4 is according to volt-ampere actuation test data, according to the definition of mutual inductor 5% and 10% graph of errors, directly draw its curve.
Claims (3)
1. a portable type current transformer graph of errors proving installation, comprise pci signal capture card (1), power supply exports control card (2), controllable electric power (3), PC (4), it is characterized in that, the signal input part of pci signal capture card (1) is connected with current transformer (TA) secondary side, pci signal capture card (1) connects PC (4) by pci interface, and power supply output control card (2) carries out communication with PC (4) and is connected; Current transformer (TA) secondary side connects controllable electric power (3) by gear loop; Power supply exports control card (2) and sends to pci signal capture card (1) pulse signal that trigger data reads in, pci signal capture card (1) connects controllable electric power (3) by multiple IGBT, and pci signal capture card (1) is for selecting the gear of controllable electric power (3).
2. a kind of portable type current transformer graph of errors proving installation according to claim 1, it is characterized in that, described power supply exports control card (2) and comprises power module, data processing module, serial communication module, level switch module, I/O interface, pci interface;
Described power module, powers for giving ARM single-chip microcomputer;
Described data processing module, for the low and high level of control I/O interface;
Described serial communication module, for pci interface communication, insert PC (4) by pci interface;
Described I/O interface, level switch module, for selecting power supply gear and exporting trigger pulse and gating pulse; By I/O interface, select the gear that will carry out the power supply measured, and multi-way control signals pulse is provided.
3. a kind of portable type current transformer graph of errors proving installation according to claim 1, it is characterized in that, the different gear of described controllable electric power (3) forms different gear loop from current transformer (TA) secondary side, an IGBT is accessed in each gear loop, the I/O interface that power supply exports control card (2) is connected with IGBT, by the level of control I/O interface, select the gear of controllable electric power (3), simultaneously when the grid of the IGBT of this gear receive power supply export the trigger pulse that control card (2) sends time, this gear loop is in running order, pci signal capture card (1) carries out data acquisition, pci signal capture card (1) gathers secondary side current signal, finally result is sent to PC (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520183723.XU CN204462368U (en) | 2015-03-30 | 2015-03-30 | A kind of portable type current transformer graph of errors proving installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520183723.XU CN204462368U (en) | 2015-03-30 | 2015-03-30 | A kind of portable type current transformer graph of errors proving installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204462368U true CN204462368U (en) | 2015-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520183723.XU Expired - Fee Related CN204462368U (en) | 2015-03-30 | 2015-03-30 | A kind of portable type current transformer graph of errors proving installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204462368U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698423A (en) * | 2015-03-30 | 2015-06-10 | 三峡大学 | Error curve testing device for portable current transformer |
-
2015
- 2015-03-30 CN CN201520183723.XU patent/CN204462368U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698423A (en) * | 2015-03-30 | 2015-06-10 | 三峡大学 | Error curve testing device for portable current transformer |
| CN104698423B (en) * | 2015-03-30 | 2018-07-31 | 三峡大学 | A kind of portable type current transformer error curve test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160330 |